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Electrical resistivity of plasma-sprayed titanium diboride coatings

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Abstract

Plasma-sprayed TiB2 coatings (50–600 μm thick) on alumina substrates have been developed and characterized. X-ray diffraction studies, thermal analysis and oxygen analysis of the coatings show that there is appreciable oxidation of TiB2 during the spray process. Partial oxidation of the boride during spraying strongly influences the electrical conductivity of the coatings, which is found to be 100–1000 times less than that of pure TiB2. Although use of argon as shield gas during the spray process brings down the resisitivity substantially, partial oxidation of TiB2 could not be totally avoided.

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Authors and Affiliations

  1. Laser and Plasma Technology Division, Bhabha Atomic Research Centre, 400 085, Trombay, Bombay, India

    P. V. Ananthapadmanabhan, K. P. Sreekumar, P. V. Ravindran & N. Venkatramani

  2. Analytical Chemistry Division, Bhabha Atomic Research Centre, 400 085, Trombay, Bombay, India

    P. V. Ravindran

Authors
  1. P. V. Ananthapadmanabhan
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  2. K. P. Sreekumar
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  3. P. V. Ravindran
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  4. N. Venkatramani
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Ananthapadmanabhan, P.V., Sreekumar, K.P., Ravindran, P.V. et al. Electrical resistivity of plasma-sprayed titanium diboride coatings. Journal of Materials Science 28, 1655–1658 (1993). https://doi.org/10.1007/BF00363363

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  • DOI: https://doi.org/10.1007/BF00363363

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